Adar Doutchi

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physiography of Niger

…region consists of the rocky Adar Doutchi and Majia areas; it is the region of the gulbi (dried-up valleys of former tributaries of the Sokoto River) and the Tegama—a tableland of sandstone, ending, toward the Aïr, at the Tiguidit scarp. To the east the underlying rock reappears in the Damagarim,…